#include <iostream>

using namespace std;

int main(){
    int n; cin >> n;
    cout << 1 << " ";
    for (int i = 2; i < n; i+= 2){
        cout << i + 1 << " " << i << " ";
    }
    if (n % 2 == 0) cout << n << endl;
    return 0;
}